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(No Model.) 2 Sheets-Sheet '1. A. FRASER.

ORE CONCENTRATOR.

No. 459,684. Patented Sept. 15,1891.

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A. FRASER. ORE GONGENTRATOR.

No. 459,684. Patented Sept. 15, 1891.

' 1 UNITED STATES PATENT OFFICE.

ANDREW FRASER, OF SAN FRANCISCO, CALIFORNIA, ASSIGN OR TO THE RISDONIRON VORKS, OF SAME PLACE.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent N 0. 459,684, datedSeptember 15, 1891.

Application filed April 4, 1891.

To all whom it may concern.-

Be it known that 1, ANDREW FRASER, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements inOre-Concentrators; and I do hereby declare the following to beafull,clear, and exact description of said invention, such as will enableothers skilled in the art to which it most nearly appertains to make,use, and practice the same.

My invention relates to certain new and useful improvements upon theoperating mechanism fully set forth and described in Letters PatentNo.414,394, granted to Thomas R. Garnier on the 5th day of November, 1889;and it consists in operating mechanism so constructed that a positiveand uniform motion may be imparted to the concentrating-bed, and, likesaid patent, has for its object the production of a compoundlongitudinal and reciprocating motion of said bed.

Having been engaged in the manufacture, construction, and operation ofthe Garnier concentrator, I have discovered that, owing to theunnecessary distance existing between the operating mechanism and theconcentratin g-bed, any lost motion Which may result due to wear fromworking serves to so throw the bed as to cause an irregular movementthere of, consequently resultingin aloss of the compound longitudinaland reciprocating motion desired to be imparted thereto.

The object of my invention is to overcome the above-referred-todisadvantage, and with this in view the invention consists in theimproved construction and combination of parts, as hereinafter morefully set forth.

Referring to the drawings forming a part of this specifiation, whereinsimilar letters of reference denote corresponding parts throughout theentire specification and several views, Figure 1 is a side view inelevation; Fig. 2, a front end view in elevation; Fig. 3, a top planview; Fig. 4, a detail view showing the vertical operating crank-shaft.Fig. 5 is ,a horizontal section through plate f on the plane indicatedby dotted line no 00, Fig. 2; Fig. 6, a detail view showing one of thespringrods secured to the concentrator and supportfierialNo 387,631. (Nomodel.)

ing-frame, and Fig. 7 is a view clearly illustrating the eccentricity ofthe two shafts.

The letter A is used to represent the outer or supporting frame of theconcentrator,whioh frame consists of cross and longitudinal pieces.

The movable concentrating-frame is indicated by the letter B, which ispreferably composed of T-shaped metal, and said'frame is supported abovethe outer frame by means of rods 0, through the medium ofoutwardlyextending arms or brackets 0, provided withdownwardly-extending bolts c,which fit with the cup-shaped end of rodsC, as clearly shown in Figs. 1, 2, and 6. By the employment of thesebolts (which are threaded) when the sockets become worn said bolts maybe adjusted so as to always maintain a firm fit. It will also be seenthat the lower end of rod G fits in a cup-shaped socket A, secured to orformed upon the supporting-frame, whereby toggle rods or bars havinguniversal joints are formed.

\Vithin the movable concentrating-frame B, I securein suitable bearingsthe front and rear rollers DD, over which the belt E is adapted totravel.

To the front of the stationary frame A, I secure by means of bolts orotherwise the metallic plate E, and within suitable bearings securedthereto works the shaft (1, upon the outer end of which is located thedrivewheel E while the inner end is provided with the bevelfriction-wheel E which works within the opening E formed in the frontplate. lic concentrating-frame I bolt or otherwise secure thebearing-plates f f within which are secured the bearing-blocks g g o bymeans of the bolt h, working through forwardlyprojecting flange h of theplates f f. By means of bolt h the bearing-blocks are made adjustable,so as to readily allow of compensation for the wear thereof.

To said front plate and end of rnetal- Passing through and workingwithin the 5 bearing-blocks is the vertical crankshaft F, which hasrigidly secured thereon the bevelwheel F, which works within opening Eand is adapted to contact with bevel-wheel E This crankshaft is formedof an inner 10o member and an outer member, held together eccentricallyand rotatable in unison. As the upper ends of these two rigid shaftspass through and engage the concentrating-frame, it is obvious that whenrotateda crank movement is imparted, which results in a gyratorymovement being transmitted to the concentrating-frame. However, if sodesired, instead of frictional contact being made between thebeveLwheels, the wheels may be ordinary bevel gear-wheels adapted tomesh one with the other.

Below and secured to the front plate works the hand-screw F which isadapted to raise or lower the crank-shaft F sufficiently to throw thebevel-wheels in or out of contact. The upper end of the crank-shaft Fextends above the concentrating -frame and has secured thereon thecone-pulley G, which is connected to the cone-pulley G by means of beltg Cone G is mounted on vertical worm-shaft G which engages withworm-wheel II, attached to the extending axle g" of roll D. The verticalshaft has its bearing in the laterally-extending bifurcated end I) ofplate B. The belt g is held in place by means of the adjustable guideII. This guide consists of an arm h", provided with a centralscrew-threaded socket and having extending inwardly from each endthereof bifurcated arms 7L5 7L5, which embrace the belt and form a guidetherefor.

Engaging the central socket of arm it is a vertical screw-bolt E, whichhas its bearings in a bracket E, secured to plate E, the upper endpassing through a socket 6, formed upon the bracket. By the employmentof this screw-bolt in connection with the guide it will be seen that thevertical adjustment of the latter with reference to the pulley-belt maybe regulated. The rear end of the concentrating-frame is provided withthe spring plate 71 which is secured to the rear beam II of the outerframe.

Below the concentrating-frame is located the water-tank I, (shown bydotted lines, Fig. 1,) and within the same projects the roll I, whichworks in bearings formed in bracket. 1 To the rear of said roll I locatethe smaller roll if, which is also suspended by said bracket and workswithin sliding bearings formed therein and by means of hand-screw 2" ismade adjustable, so as to regulate the tension of theconcentrating-belt. It will be seen that the hand-screw 't workshorizontally through one end of the bracket and engages theupwardly-extending flange i extending from the sliding bearings. Thebelt E passes over the rolls D D, under roll I, and over roll 1'. As itpasses under roll I it is thoroughly cleaned by the water contained inwater-tank I.

To the forward end of the movable frame I locate the pulp-receptacle J,and in front of said'receptacle is secured the water-distributer J,which is supplied by means of suitable supply-pipes. (Not shown.) Thebottom of said distributer is provided with a series of perforations j,which permits'of the retained water flowing freely therethrough onto theore or pulp carried thereunder by means of the traveling belt whichpasses beneath the same.

The operation of my machine is as follows: Power being applied todrive-wheels E by any suitable mechanism, (not shown,) shaft to iscaused to rotate, carrying therewith bevelwheel E, which contacting withbevel-wheel F transmits motion thereto, which being rigidly secured tocrank-shaft F causes the revolving thereof. Inasmuch as the crank-shat tpasses through the concentrating-frame, it is obvious that with therotation thereof a gymtory movement is imparted to the forward end ofthe concentrating-bed. The motion of the crank-shaft F is imparted tothe wormshaft Gr through the medium of the belt 9, which works over thecone-pulleys G G, and said worm-shaft in turn transmits its motion tothe worm-wheel H, which being rigidly affixed to shaft or axle gnecessarily causes the rotation of the roll I), so as to cause motion tobe imparted to the concentrating-belt. Inasmuch as the rear end of theframe is provided with the spring-plate h, secured to the rear beam H itis obvious that this end of the concentrating bed or frame is confinedto a longitudinal movement. Thus I have imparted to the movable bedacompound reciprocating and longitudinal movement. The pitch of themachine is such as to provide a gradual ascent from the rear to theforward end. The adjustable guide 11 serves to maintain theconnecting-belt g from slipping off. the conepulleys during the rotationthereof. By means of the adjustable roll 1' the tension of theconcentrating-belt may be easily regulated. I

By means of a concentrator constructed in accordance with the abovedescription the pulp or ore containing the metal to be separated isdistributed upon the belt while in retary motion, by which it is carriedforward and exposed to the action of the water-flow, which, inconnection with the oscillatory motion of the belt and frame, causes theseparation of the lighter particles from the heavier. The heavierparticles remaining upon the belt are carried beneath the flow of waterover the front roller, while the lighter or worthless particles arecarried to the rear by the downward flow of the water. As the motionimparted to the rear end of the frame and belt "is very slight, whateverof the sulphurets may be contained in the lighter particles will falland settle upon the belt and, adhering thereto, will be carried forwardbeneath the waterreservoir over the forward roller. If so desired, thebearing-plates may be formed integral with the front plate andconcentratorframe, thereby allowing each to be completed in one castingand of ready packing for shipment.

I am aware that minor changes may be made in the arrangement of partsand details of construction herein shown and described withoutnecessitating or creating a departure from the nature and scope of myinvention.

Having thus fully described my invention, what I claim as new, anddesire to secure protection in by Letters Patent of the United.

States, is

1. In an ore-concentrator, the combination of a supporting-frame, ametallic plate secured to the forward end thereof, said plate having acentral opening, therein, a horizontal shaft j ournaled in suitablebearings in the frame, said shaft provided upon its outer end withadrive-pulley and its inner end extending into the opening of the plateand carrying a bevel-gear, a vertical shaft passing through the openingof the plate and carrying near its lower end and within the opening abevel-gear meshing with the gear of the horizontal drive-shat t, and aconcentratingframe engaged and actuated by the upper end of the verticalshaft, substantially as set forth.

2. In an ore-concentrator, the combination of a supporting-frame, ametallic plate secured to the forward end thereof, aconcentrating-frame, a plate secured thereto and having one end extendedand bifurcated, a rotatable vertical shaft engaging and actuating theconcentrating-frame and carrying upon its upper end a cone-pulley, avertical screw-shaft journaled in the bifurcated end of the upper plate,having its lower end stepped in a socket in the lower plate and itsupper end carrying a cone-pulley, and a belt connecting the twocone-pulleys, substantially as set forth.

3. In an ore-concentrator, the combination of a supporting-frame, aplate secured at one end thereof, a concentrating-frame, a Verticalrotatable shaft engaging and actuating the said frame and carrying uponits upper end a cone-pulley, a plate secured to the concentrating-framehaving one end extended, a screw-shaft working in bearings in saidextended end and carrying upon its upper end a cone-pulley, abeltconnecting the cone-puL leys, an arm secured to the lower plate andprovided at its upper end with a screw-threaded opening, a threaded boltworking in said opening, and a beltfguide adjustable upon said bolt andconsisting of an arm provided with a central eye engaging the bolt andhaving at opposite ends inwardly-extending bifurcated members engagingthe belt, substantially as set forth.

4. In an ore-concentrator, the combination of a supporting-frame havingsocket-pieces secured thereto, a concentrating-frame proyided withlaterally-extending eyed arms, setscrews passing through the eyes, andsupporting-rods having their upper ends provided with sockets engaged bythe set-screws and their lower ends engaging the socket-pieces of thesupporting-frame, and means for agitating the concentrating-frame,substantially as set forth.

5. lhe combination, with the outer frame of an ore-concentrator, of themovable concentrating-frame located thereon-,operating-shaft securedwithin bearings to the front of the outer frame, said shaft carrying adrive and frictional bearing-wheel, vertical adjustable crank-shaftcarrying a frictional bevel-Wheel adapted to contact and be operated bythe bevel-wheel located on the operating-shaft, and the hand-wheel forraising or lowering the vertical crank-shaft, substantially as. and forthe purpose set forth.

In testimony whereof Iaffix my signature in presence of two witnesses.

ANDREW FRASER.

Witnesses:

N. A. AOKER, J. W. KEYS.

